Best time to visit Gardiner
The best time to visit Gardiner is July–August, judged on twenty years of weather records and the events worth going for.
Gardiner, Montana, United States
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | -5.5 °C / 22 °F | -13.6 °C / 8 °F | 46 mm / 1.8 in | neither best nor good |
| February | -3.9 °C / 25 °F | -12.5 °C / 10 °F | 55 mm / 2.1 in | neither best nor good |
| March | 1.1 °C / 34 °F | -8.5 °C / 17 °F | 59 mm / 2.3 in | neither best nor good |
| April | 4.4 °C / 40 °F | -6 °C / 21 °F | 72 mm / 2.8 in | neither best nor good |
| May | 9.1 °C / 48 °F | -2.6 °C / 27 °F | 73 mm / 2.9 in | neither best nor good |
| June | 17 °C / 63 °F | 2.5 °C / 37 °F | 69 mm / 2.7 in | good month |
| July | 23.2 °C / 74 °F | 6.7 °C / 44 °F | 36 mm / 1.4 in | best month |
| August | 21.7 °C / 71 °F | 5.8 °C / 42 °F | 41 mm / 1.6 in | best month |
| September | 16.7 °C / 62 °F | 1.9 °C / 35 °F | 47 mm / 1.8 in | good month |
| October | 7 °C / 45 °F | -5.1 °C / 23 °F | 62 mm / 2.4 in | neither best nor good |
| November | -0.6 °C / 31 °F | -11.8 °C / 11 °F | 50 mm / 2 in | neither best nor good |
| December | -5.7 °C / 22 °F | -14.4 °C / 6 °F | 52 mm / 2 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: neither
- JJune: good
- JJuly: best
- AAugust: best
- SSeptember: good
- OOctober: neither
- NNovember: neither
- DDecember: neither
- Best
- July–August
- Good
- June, September
Why these months
June · good
In its favour: feels like (high) 14.6 °C / 58 °F, share of daylight that is sunny 87%, precipitation 69 mm / 2.7 in, average daily high 17 °C / 63 °F, days with heavy rain 1.5 days, relative humidity 64%.
Against: wet days 14.2 days, average daily low 2.5 °C / 37 °F.
July · best
In its favour: feels like (high) 21.2 °C / 70 °F, average daily high 23.2 °C / 74 °F, precipitation 36 mm / 1.4 in, share of daylight that is sunny 94%, days with heavy rain 0.5 days, wet days 9.6 days, relative humidity 55%, average daily low 6.7 °C / 44 °F.
August · best
In its favour: feels like (high) 19.2 °C / 67 °F, average daily high 21.7 °C / 71 °F, precipitation 41 mm / 1.6 in, share of daylight that is sunny 90%, days with heavy rain 0.8 days, wet days 9.1 days, relative humidity 54%, average daily low 5.8 °C / 42 °F.
September · good
In its favour: precipitation 47 mm / 1.8 in, share of daylight that is sunny 88%, feels like (high) 13.4 °C / 56 °F, average daily high 16.7 °C / 62 °F, days with heavy rain 1.1 days, wet days 8.4 days, relative humidity 60%.
Against: average daily low 1.9 °C / 35 °F.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: good
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: neither
- NNovember: neither
- DDecember: neither
- Best
- June–September
- Good
- May
Why these months
May · good
In its favour: precipitation 73 mm / 2.9 in, average daily high 9.1 °C / 48 °F, days with heavy rain 1.3 days, share of daylight that is sunny 83%, daylight per day 14.9 h, wind (daily max) 13 km/h / 8 mph, feels like (high) 6.4 °C / 44 °F.
Against: wet days 14.7 days, average daily low -2.6 °C / 27 °F.
June · best
In its favour: average daily high 17 °C / 63 °F, precipitation 69 mm / 2.7 in, days with heavy rain 1.5 days, feels like (high) 14.6 °C / 58 °F, share of daylight that is sunny 87%, daylight per day 15.6 h, average daily low 2.5 °C / 37 °F, wind (daily max) 15 km/h / 9 mph.
Against: wet days 14.2 days.
July · best
In its favour: precipitation 36 mm / 1.4 in, average daily high 23.2 °C / 74 °F, days with heavy rain 0.5 days, wet days 9.6 days, feels like (high) 21.2 °C / 70 °F, average daily low 6.7 °C / 44 °F, share of daylight that is sunny 94%, daylight per day 15.2 h, wind (daily max) 14 km/h / 9 mph.
August · best
In its favour: average daily high 21.7 °C / 71 °F, precipitation 41 mm / 1.6 in, days with heavy rain 0.8 days, wet days 9.1 days, feels like (high) 19.2 °C / 67 °F, average daily low 5.8 °C / 42 °F, share of daylight that is sunny 90%, daylight per day 14 h, wind (daily max) 13 km/h / 8 mph.
September · best
In its favour: average daily high 16.7 °C / 62 °F, precipitation 47 mm / 1.8 in, days with heavy rain 1.1 days, wet days 8.4 days, feels like (high) 13.4 °C / 56 °F, share of daylight that is sunny 88%, daylight per day 12.5 h, average daily low 1.9 °C / 35 °F, wind (daily max) 13 km/h / 8 mph.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Big Sky Resort, 57 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | -10.1 °C | -8.7 °C | -3.4 °C | 0.6 °C | 6.4 °C | 14.6 °C | 21.2 °C | 19.2 °C | 13.4 °C | 3 °C | -5.1 °C | -10.3 °C |
| Days with heavy rain | 0.3 days | 0.6 days | 0.8 days | 0.9 days | 1.3 days | 1.5 days | 0.5 days | 0.8 days | 1.1 days | 1.3 days | 0.8 days | 0.5 days |
| Time rain usually falls | 6 am | 3 pm | 4 pm | 5 pm | 6 pm | 5 pm | 6 pm | 5 pm | 5 pm | 5 pm | 9 am | 11 am |
| Sunshine per day | 6.9 h | 7.9 h | 9.8 h | 11 h | 12.4 h | 13.5 h | 14.3 h | 12.6 h | 11 h | 9 h | 7.3 h | 6.3 h |
| Relative humidity | 78% | 77% | 72% | 70% | 72% | 64% | 55% | 54% | 60% | 72% | 79% | 80% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 3.1 µg/m³ | 4.2 µg/m³ | 6.8 µg/m³ | 8.6 µg/m³ | 8.4 µg/m³ | 7.4 µg/m³ | 7.5 µg/m³ | 6.7 µg/m³ | 5.6 µg/m³ | 3.5 µg/m³ | 3.9 µg/m³ | 3.3 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 5.8 µg/m³ | 7.4 µg/m³ | 11.5 µg/m³ | 14.1 µg/m³ | 13.7 µg/m³ | 12 µg/m³ | 12.4 µg/m³ | 10.5 µg/m³ | 9.6 µg/m³ | 6.6 µg/m³ | 6.9 µg/m³ | 6.2 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.